Official NHA Assessment

Race 3: FOR HOSPITALITY BOOKINGS CALL 011 681 1796 MR 96 HANDICAP (Open)

Back to Race
Line Horse
Total Surrender
Reference for assessment
Exact Matches
1 / 8
Calculated = Official
Close Matches
2 / 8
Within 2 points
Significant Diffs
6 / 8
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------
Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
------------------------------------------------------------------------------------------------------------------------
1    Tamarisk Tree        5    59.5    1    0.00     0.0   95    91           95    +0
2    Vesuvio              5    55.5    2    0.25     0.0   87    83           83    -4
3    Total Surrender      5    55.5    3    2.35     0.0   87    87           87    +0
4    Hawkbill             4    59.0    4    4.75     2.5   94    85           85    -9
5    Douglas Dragon       3    52.5    5    5.00     5.0   81    67           71    -10
6    Rule Book            6    60.0    6    6.40     0.0   96    92           92    -4
7    Jordan               4    54.5    7    6.80     2.5   88    76           78    -10
8    Robert Browning      3    48.0    8    8.30     5.0   82    58           72    -10
------------------------------------------------------------------------------------------------------------------------

Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Tamarisk Tree 95 105 95 +10 0.0 -
2 Vesuvio 87 85 83 +2 0.0 -
3 Total Surrender Line 87 74 87 -13 0.0
4 Hawkbill 94 100 85 +15 2.5 -
5 Douglas Dragon 81 89 71 +18 5.0 -
6 Rule Book 96 92 92 ✓ Match 0.0 -
7 Jordan 88 88 78 +10 2.5 -
8 Robert Browning 82 87 72 +15 5.0 -
Assessment Methodology
Calculation Steps:
  1. Identify Line Horse - consistent performer used as reference
  2. Calculate WFA Allowance based on age, distance, and month
  3. Apply Drag Adjustment for beaten margin
  4. Calculate Actual Weight Performance:
    Weight - Drag - WFA
  5. Compare to Line Horse to determine race rating
  6. Apply special rules (maiden caps, layoff allowance)
Key Formulas:
  • Drag Effect: Varies by distance (see Benchmarks page)
  • 1 length ≈ 1kg at 1 mile (1600m)
  • WFA Scale: Based on Admiral Rous's 1855 table
  • Rating Points: 1kg = 2 rating points